Reopening Classes and Instances Edit Page
You don't need to define a class all at once. You can reopen a class and
define new properties using the reopen()
method.
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Person.reopen({ isPerson: true }); Person.create().get('isPerson'); // true |
When using reopen()
, you can also override existing methods and
call this._super
.
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Person.reopen({ // override `say` to add an ! at the end say(thing) { this._super(thing + '!'); } }); |
reopen()
is used to add instance methods and properties that are shared
across all instances of a class. It does not add
methods and properties to a particular instance of a class as in vanilla JavaScript (without using prototype).
But when you need to add static methods or static properties to the class itself
you can use reopenClass()
.
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// add static property to class Person.reopenClass({ isPerson: false }); // override property of Person instance Person.reopen({ isPerson: true }); Person.isPerson; // false - because it is static property created by `reopenClass` Person.create().get('isPerson'); // true |